Process for the manufacture of briquets from suitable briquet materials.



' brass and so on. This is effected most read-.

CARL FOHR, OF MUNICH, GERNY.

PROCESS FOR THE MANUFACTURE OF BRIQ'UETS FROM SUITABLE BRIQUET MATERIALS.

No Drawing.

To all 'whomit may concern:

Be it known that I, CARL Fons, citizen of Germany, residing at Munich, Bavaria, Germany, have invented certain new and useful Improvements in Processes for the Manufacture of Briquets from Suitable Briquet Materials; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

It is known to prepare pitch in the form of dust resembling soot, consisting of dry and extraordinarily fine particles of pitch,by

melting pitch and then spraying or atomizing it through spraying nozzles or the like and cooling it. The present invention 1s based on the discovery that by using such a pitch dust extraordinarily important advantages are attained in the manufacture oi briquets.

Hitherto coal-tar pitch or the like has been exclusively employed in the form of a more or less fine grained powder since pulverization to dust fineness is not possible without further treatment in the disintegrator or ballor roller mills hitherto employed. The coal-tar pitch or the like becomes warm and adheres to the pulverizing member, the container, balls, rollers or the like, so that it is necessary to clean the roll-- ers, etc., very frequently or to cool them strongly. This makes the pulverization process considerably more expensive and tedious. On the other hand it has been proposed to add coal-tar pitch or the like to the briquet material in the molten or liquid state. However, this process gives bad results since the mixture of the molten pitch with the finely divided coal and the like is not sufiiciently homogeneous and intimate. Lumps of liquid pitch and finely divided coal are formed and the briquets so produced have an extremely heterogeneous structure.

According to the present invention the above described disadvantages are obviated by transforming the pitch into the finest dry powder, or into dry pitch dust or pitch meal by spreading or atomizing as above described, and then adding the pitch in this state to the briquet material, 2'. 6. coal, ore,

ily by blowing the pitch dust directly on to the briquet material through the spraying Specification of Letters Patent.

Patented J an. 5, 1915.

Application filed July 24L, 1913. Serial No. 780,892.

and atomizing nozzles. In this way it is possible to obtain an extremely homogeneous admixture and an easy and sensitive regulation of the quantity of pitch added. Owing to the extraordinary fineness of the pitch dust the particles of coal or ore, brass and the like are extremely homogeneously coated with a thin layer of pitch so that when the briquet material is subsequently pressed the binding is far more complete than hitherto. Moreover considerable economy in pitch can be elf ected while at the same time securing greater strength of the briquets. Finally when the pitch is blown directly into the mixing drum or the like by means of atomizing devices closed from the atmosphere, it is possible to avoid escape of the pitch dust and the consequent injury to the health of the Workers. The briquets are also improved since briquets with a high pitch content give more soot on combustion than briquets with a smaller pitch content. It should be added that other binding agents may be employed instead of pitch in theabove described manner, for example other bitumens such as asphalt or tar, resins and the like.

For the sake of brevity I call the briquet material a finely divided carbonaceous material, but it is to be understood that I use this term as comprehending all the materials usually employed for briquets to which my prolcess is applicable, 2'. e. ore or brass materia I declare that what I claim is l. The herein described method of manufacturing briquets, which consists in spraying or atomizing a liquid binding agent to con'vert the same into an extremely fine perfectly dry powder, and admixing said powder with a finely divided briquet material.

2. The herein described method of manufacturing briquets, which consists in spraying or atomizing molten pitch to convert the same into an extremely fine perfectly dry powder, and admixing said powder with a finely divided briquet material.

3. The herein described method of manufacturing 'briquets, which consists in projecting a molten binding agent in spray or atomized form directly into admixture with a finely divided briquet material, said bind ing agent being projected a sufiicientdistance to convert the same into extremely fine briquet material. deras it admixes with the briquet material. 10 4. The herein described method ofmanu- In testimony whereof I hereunto afiix my facturing briquets, which consists in prosignature in the presence of two witnesses. jecting molten pitch in spray or atomized CARL FOHR. form directly into admixture with a finely Witnesses: divided briquet material, said pitch being A. V. W. CO'I'IER, projected a suflicient distance to convert the RICHARD LEMP.

perfectly dry powder as it admixes' with the same into extremely fine perfectly dry pow- 

